Mr. Purple Cat Esq.France at that time (1934) had a very large rural population which could not yet afford automobiles; Citroën used the survey results to prepare a design brief for a low-priced, rugged "umbrella on four wheels" that would enable four small farmers / peasants in clogs to transport 50 kg (110 lb) of farm goods to market at 50 km/h (31 mph), if necessary across muddy, unpaved roads. The car would use no more than 3 liters of gasoline to travel 100 km (78 mpg ). One design requirement was extremely light weight. Another was that the customer be able to drive eggs across a freshly ploughed field without breaking them.

OktayYou forgot to mention that 2CV refers to the fact that they have 2HP engines, yes TWO horsepower engines, which is pretty impressive too. (Hence the 78 mpg I guess.)